Accession Number : ADA187455

Title :   A Finite Element Analysis of Adhesively Bonded Composite Joints Including Geometric Nonlinearity, Nonlinear Viscoelasticity Moisture Diffusion and Delayed Failure.

Descriptive Note : Interim rept.,

Corporate Author : VIRGINIA TECH CENTER FOR ADHESION SCIENCE BLACKSBURG

Personal Author(s) : Roy, S ; Reddy, J N

PDF Url : ADA187455

Report Date : Oct 1987

Pagination or Media Count : 92

Abstract : A two-dimensional finite-element computational procedure is developed for an analysis of adhesively bonded joints with nonlinear viscoelasticity, moisture diffusion and delayed failure models. Effect of temperature and stress level on the viscoelastic response is taken into account by a nonlinear shift factor definition, and penetrant sorption is accounted via a nonlinear Fickean diffusion model in which the diffusion coefficient is dependent on the penetrant concentration and dilatational strain. A delayed failure criterion based on the Reiner-Weisenberg failure theory is also included. Several example problems are: Adhesive joints, bonded joints, finite element analysis, composite joints, moisture diffusion, delayed failure, nonlinear viscoelasticity, numerical results.

Descriptors :   *ADHESIVE BONDING, *BONDED JOINTS, *COMPOSITE MATERIALS, *VISCOELASTICITY, COMPOSITE STRUCTURES, COMPUTATIONS, DIFFUSION, DIFFUSION COEFFICIENT, FINITE ELEMENT ANALYSIS, GEOMETRY, JOINTS, MODELS, MOISTURE, NONLINEAR SYSTEMS, NUMERICAL ANALYSIS, PENETRATION, SHIFTING, SORPTION, STRESSES, TWO DIMENSIONAL, LAMINATES, STRESS STRAIN RELATIONS, MATHEMATICAL ANALYSIS, ENERGY TRANSFER

Subject Categories : Couplers, Fasteners, and Joints
      Laminates and Composite Materials
      Adhesives, Seals and Binders
      Numerical Mathematics

Distribution Statement : APPROVED FOR PUBLIC RELEASE